API reference / @evolu/common / Array / isNonEmptyArray

Function: isNonEmptyArray()

function isNonEmptyArray<T>(array): array is [T, ...T[]];

Defined in: packages/common/src/Array.ts:117

Checks if an array is non-empty and narrows its type to NonEmptyArray.

Use if (!isNonEmptyArray(arr)) for empty checks.

Example

const arr: Array<number> = [1, 2, 3];
if (isNonEmptyArray(arr)) {
  firstInArray(arr); // arr is NonEmptyArray<number>
}

Type Parameters

Parameters

Returns

array is [T, ...T[]]